General Motors (GM) has seen its Buick brand increase its leasing rate to the highest level...

General Motors (GM) has seen its Buick brand increase its leasing rate to the highest level since 1999 as a new program launched last year delivers stronger results than forecast. Overall YTD sales for the brand are up 22% Y/Y. The key metric to watch in gauging Buick: The average age of Buick drivers has fallen to 57 from 64 over the last five years.